package com.yk.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import lombok.SneakyThrows;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

@Service
public class PaymentService {

    public String paymentInfo_OK(Integer id) {
        return "线程池:" + Thread.currentThread().getName() + " paymentInfo_OK,id:" + id + "\t" + "O(∩_∩)O哈哈~";
    }

    @SneakyThrows
    @HystrixCommand(
            fallbackMethod = "paymentInfo_TimeOut_Handler"
            , commandProperties = {
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "5000")
    })
    public String paymentInfo_TimeOut(Integer id) {
//        int age = 10 / 0;
        Thread.sleep(3000);
        return "线程池:" + Thread.currentThread().getName() + " paymentInfo_TimeOut,id:" + id + "\t" +
                "O(∩_∩)O哈哈~ " ;
    }


    public String paymentInfo_TimeOut_Handler(Integer id) {

        return "线程池:" + Thread.currentThread().getName() + " paymentInfo_TimeOut,id:" + id + "\t" +
                "系统繁忙,或者运行报错 请稍后再试  耗时(秒)";
    }


    //====服务熔断

    /**
     * 在10秒窗口期中10次请求有6次是请求失败的,断路器将起作用
     * @param id
     * @return
     */
    @HystrixCommand(
            fallbackMethod = "paymentCircuitBreaker_fallback", commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled", value = "true"),// 是否开启断路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"),// 请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "10000"),// 时间窗口期/时间范文
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "60")// 失败率达到多少后跳闸
    }
    )
    public String paymentCircuitBreaker(@PathVariable("id") Integer id) {
        if (id < 0) {
            throw new RuntimeException("*****id不能是负数");
        }
        String serialNumber = IdUtil.simpleUUID();
        return Thread.currentThread().getName() + "\t" + "调用成功,流水号:" + serialNumber;
    }

    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id) {
        return "id 不能是负数";
    }
}
